Desorption isotherms of shelled maize: whole, dehulled and hulls

Water vapour desorption isotherms of whole kernel maize were determined at 40, 50 and 60°C, and those of dehulled kernels and hulls at 50 and 60°C. It was found that while whole and dehulled kernels show similar equilibrium moisture contents, the hull gives lower values. Equilibrium data were modell...

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Autores principales: TOLABA, M.P., SUAREZ, C.
Formato: JOUR
Materias:
BET equation
isosteric heat of desorption
sorption thermodynamics
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09505423_v25_n4_p435_TOLABA
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09505423_v25_n4_p435_TOLABA
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spelling todo:paper_09505423_v25_n4_p435_TOLABA2023-10-03T15:50:20Z Desorption isotherms of shelled maize: whole, dehulled and hulls TOLABA, M.P. SUAREZ, C. BET equation isosteric heat of desorption sorption thermodynamics Water vapour desorption isotherms of whole kernel maize were determined at 40, 50 and 60°C, and those of dehulled kernels and hulls at 50 and 60°C. It was found that while whole and dehulled kernels show similar equilibrium moisture contents, the hull gives lower values. Equilibrium data were modelled with two‐parameter equations. It was found that the Henderson equation is best for describing the equilibrium data for whole kernels, while the Halsey equation was more appropriate for hulls. A simple semi‐theoretical equation was used to model the effect of temperature on the equilibrium values of whole maize kernels for the three temperatures investigated. BET heats of desorption and the isosteric heat curves were calculated for whole kernels and hull. It was found that the BET heat values correlate quite well with the isosteric heat values at the monolayer moisture content. Copyright © 1990, Wiley Blackwell. All rights reserved JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09505423_v25_n4_p435_TOLABA
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic BET equation
isosteric heat of desorption
sorption thermodynamics
spellingShingle BET equation
isosteric heat of desorption
sorption thermodynamics
TOLABA, M.P.
SUAREZ, C.
Desorption isotherms of shelled maize: whole, dehulled and hulls
topic_facet BET equation
isosteric heat of desorption
sorption thermodynamics
description Water vapour desorption isotherms of whole kernel maize were determined at 40, 50 and 60°C, and those of dehulled kernels and hulls at 50 and 60°C. It was found that while whole and dehulled kernels show similar equilibrium moisture contents, the hull gives lower values. Equilibrium data were modelled with two‐parameter equations. It was found that the Henderson equation is best for describing the equilibrium data for whole kernels, while the Halsey equation was more appropriate for hulls. A simple semi‐theoretical equation was used to model the effect of temperature on the equilibrium values of whole maize kernels for the three temperatures investigated. BET heats of desorption and the isosteric heat curves were calculated for whole kernels and hull. It was found that the BET heat values correlate quite well with the isosteric heat values at the monolayer moisture content. Copyright © 1990, Wiley Blackwell. All rights reserved
format JOUR
author TOLABA, M.P.
SUAREZ, C.
author_facet TOLABA, M.P.
SUAREZ, C.
author_sort TOLABA, M.P.
title Desorption isotherms of shelled maize: whole, dehulled and hulls
title_short Desorption isotherms of shelled maize: whole, dehulled and hulls
title_full Desorption isotherms of shelled maize: whole, dehulled and hulls
title_fullStr Desorption isotherms of shelled maize: whole, dehulled and hulls
title_full_unstemmed Desorption isotherms of shelled maize: whole, dehulled and hulls
title_sort desorption isotherms of shelled maize: whole, dehulled and hulls
url http://hdl.handle.net/20.500.12110/paper_09505423_v25_n4_p435_TOLABA
work_keys_str_mv AT tolabamp desorptionisothermsofshelledmaizewholedehulledandhulls
AT suarezc desorptionisothermsofshelledmaizewholedehulledandhulls
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